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Gaurav Seth 5 years, 6 months ago

1. Excess water is removed through stomata by transpiration which is the process of removal or evaporation of water.

2. Plants also get rid of oxygen, a by - product in the process of photosynthesis and carbon dioxide which is the by - product formed during respiration. The plants get rid of these by stomata present in their leaves.

3. Some of the wastes stored in the leaves are removed by the detachment of the leaves itself from the tree.

4. Waste are also stored in the cellular vacuoles which do not affect the functioning of cytoplasm because of its outer membrane known as tonoplast.

5. Other waste products are stored in resins and gums, especially in old xylem which stops working thereby.
The thing is that the plant have many xylem tissues for the transportation of water and old xylem tissues always get replaced by the new ones.

6. Terrestrial plants excrete some waste into the soil around them whereas aquatic plants remove the wastes by the process of diffusion.

ANSWER

A glotiss is guarded by epiglottis

Posted by Pradeep Yadav 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Gaurav Seth 5 years, 6 months ago

The glottis is guarded by epiglottis because it prevents the entry of food in wind pipe. If the food enters wind pipe, then it chokes it, leading to the death of the person.

ANSWER

A tarnished copper vessel begins to shine again when rubbed with lemon. why?

Posted by Robotech Vansh 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Gaurav Seth 5 years, 6 months ago

Copper vessel is tarnished due to copper oxide layer formed on its surface .
Copper oxide is basic in nature. The green coating on copper vessels is due to the formation of basic copper carbonate formed by the attack of O2, CO2 and moisture of the air on the copper vessel.

Lemon is acidic. Thus, on rubbing the tarnished copper vessel with lemon, the basic copper oxide or copper carbonate reacts with the acid (citric acid) present in the lemon to form a salt which is washed away with water

ANSWER

Copper and aluminium wires are usually employed for electricity transmission.why?

Posted by Tarsem Kaur 5 years, 6 months ago

CBSE > Class 10 > Science

2 answers

Little Master 2005 5 years, 6 months ago

Because both are good conductor of electricity and are cheap

Kritika Dhiman 5 years, 6 months ago

Because they are good conductors of electricity and are cheap

ANSWER

Write the balanced chemical equation for the following reactions . Barium chloride + pottasium sulphate → Barium sulphate + pottasium chloride .

Posted by Devashree Kale 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Rekha Popli 5 years, 6 months ago

BaCl2+K2SO4=BaSO4+KCl

ANSWER

Is cyclone and tornado same? If not then write difference.

Posted by Lucifer ? Morningstar? 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Ishika ? 5 years, 6 months ago

No they are not same. Actually CYCLONE- It is a large destructive storm that is comprised of large winds rotating around a centre of low pressure. TORNADO - It often occur in groups.☺️☺️☺️☺️

ANSWER

What is tornado?

Posted by Lucifer ? Morningstar? 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Shashi Prakash Singh 5 years, 6 months ago

The definition of tornado is a twirling, narrow funnel of wind with speeds of 100 to 300 miles per hour that can damage anything in its path.

ANSWER

Currency of makaow?

Posted by Lucifer ? Morningstar? 5 years, 6 months ago

CBSE > Class 10 > Science

2 answers

Ishika ? 5 years, 6 months ago

Macanese pataca?

Vedika M 5 years, 6 months ago

Macanese pataca

ANSWER

What do u mean by fundamental units?

Posted by Lucifer ? Morningstar? 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 6 months ago

The units which can neither be derived from other units nor they can be further resolved into simpler units are called fundamental units. Examples: Mass, length etc.

ANSWER

Advantage of nuclear energy.?

Posted by Mahi..... ♾ 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Lucifer ? Morningstar? 5 years, 6 months ago

1)One of the most low-carbon energy sources. 2)It also has one of the smallest carbon footprints. 3) It's one of the answers to the energy gap. 4) It is essential to our response to climate change and greenhouse gas emissions. 5)Reliable and cost-effective

ANSWER

Discuss some major merits of the mendeleev's periodic table

Posted by Vivek Rajput 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Lucifer ? Morningstar? 5 years, 6 months ago

Mendeleev's periodic table was that when these gases were discovered, they could be placed in a new group without disturbing the existing order.

ANSWER

Name two matel which are found in nature in the free state

Posted by Bhushan Sah 5 years, 6 months ago

CBSE > Class 10 > Science

2 answers

Prashant Lohani 5 years, 6 months ago

Diamond and gold

Mahi..... ♾ 5 years, 6 months ago

May be silver and gold

ANSWER

What is speciation???

Posted by ?Rahul ? 5 years, 6 months ago

CBSE > Class 10 > Science

4 answers

꧁༒ Shaurya༻ 5 years, 6 months ago

Galdi bata do

꧁༒ Shaurya༻ 5 years, 6 months ago

Suno AP tumara full name kya ha

A P 5 years, 6 months ago

Kaha se ho tum rahul

Yogita Ingle 5 years, 6 months ago

The process by which a new species develops from the existing species is known as speciation.

Speciation is caused due to three factors, which are:

Geographical isolation: Caused due to reproductive isolation in separated groups of a population.
Genetic drift: Caused due to changes in the gene flow imposed by the isolation mechanism.
Natural selection: Caused due to genetic variation within a population of an organism.

ANSWER

Eg of acids

Posted by Mithun Yadav 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Anushka ?? 5 years, 6 months ago

Tomato

ANSWER

What is Cross Product of the Vectors

Posted by Saurabh Tripathi 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Lucifer ? Morningstar? 5 years, 6 months ago

the cross product or vector product is a binary operation on two vectors in three-dimensional space and is denoted by the symbol.

ANSWER

What is Dot product

Posted by Saurabh Tripathi 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Lucifer ? Morningstar? 5 years, 6 months ago

the dot product is the sum of the products of the corresponding entries of the two sequences of numbers.

ANSWER

Who gave the theory of interitance of characters????

Posted by Ishika ? 5 years, 6 months ago

CBSE > Class 10 > Science

3 answers

Ishika ? 5 years, 6 months ago

Thanks both of u??

?Rahul ? 5 years, 6 months ago

Jean baptiste lamarck??

꧁༺★ṖŕīᑎƇɛ {Ƭĥɛ Ŀ❤Ѵɛ Ɠʊŕʊ}★༺꧂ ?? 5 years, 6 months ago

Lamarck is best know as his theory of interitance of characters..

ANSWER

What is Retrovirus??

Posted by Ishika ? 5 years, 6 months ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years, 6 months ago

Retrovirus, any of a group of viruses that belong to the family Retroviridaeand that characteristically carry their genetic blueprint in the form of ribonucleic acid (RNA). Retroviruses are named for an enzyme known as reverse transcriptase, which was discovered independently in 1971 by American virologists Howard Temin and David Baltimore. Reverse transcriptase transcribes RNA into deoxyribonucleic acid (DNA), a process that constitutes a reversal of the usual direction of cellular transcription (DNA into RNA).

?Rahul ? 5 years, 6 months ago

It is the virus containing RNA as the genetic material ????????

ANSWER

What is atmospheric refraction????

Posted by Mahi..... ♾ 5 years, 6 months ago

CBSE > Class 10 > Science

4 answers

A P 5 years, 6 months ago

Nice

Ishika ? 5 years, 6 months ago

Most wlcm☺️☺️☺️

Mahi..... ♾ 5 years, 6 months ago

Thx ???

Ishika ? 5 years, 6 months ago

The refraction of light caused by the earth's atmosphere is called atmospheric refraction.???

ANSWER

Example ozone depletion.

Posted by Mahi..... ♾ 5 years, 6 months ago

CBSE > Class 10 > Science

2 answers

Mahi..... ♾ 5 years, 6 months ago

Thanks ???

Nishtha Khandelwal 5 years, 6 months ago

Depletion of ozone layer from atmosphere due to human activities....

ANSWER

What is carbon monoxide ??

Posted by ꧁༺★ṖŕīᑎƇɛ {Ƭĥɛ Ŀ❤Ѵɛ Ɠʊŕʊ}★༺꧂ ?? 5 years, 6 months ago

CBSE > Class 10 > Science

4 answers

Ishika ? 5 years, 6 months ago

Most wlcm??

Nishtha Khandelwal 5 years, 6 months ago

Poisonous gas harming atmosphere

꧁༺★ṖŕīᑎƇɛ {Ƭĥɛ Ŀ❤Ѵɛ Ɠʊŕʊ}★༺꧂ ?? 5 years, 6 months ago

Thanks ?

Ishika ? 5 years, 6 months ago

Carbon Monoxide is poisonous, colourless, tasteless, odourless gas.????

ANSWER

What is the radius of curvature of plane mirror??

Posted by Mahi..... ♾ 5 years, 6 months ago

CBSE > Class 10 > Science

2 answers

Mahi..... ♾ 5 years, 6 months ago

Thx ??

Ishika ? 5 years, 6 months ago

☺️☺️The radius of curvature of plane mirror is equal to 0.

ANSWER

Why do HCl, HNO3,etc show acidic character in aqueous solutions of compound like alchohol and glucose do not show acidic character

Posted by Ayush Pandey 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 5 years, 5 months ago

When HCl or HNO₃ are mixed with water then they dissolve in water to form H⁺ or H₃O⁺ ions which shows their acidic character. For example just see the following reactions

When alcohols and glucose are mixed with water then they do not dissolve to form ions. Hence they do not show acidic character.

ANSWER

Explain about heart

Posted by Santoshi Behera 5 years, 6 months ago

CBSE > Class 10 > Science

2 answers

A P 5 years, 6 months ago

Yogita Ingle 5 years, 6 months ago

The heart is an organ that pumps blood throughout the body. It comprises four chambers:

Atria (upper chambers)
Ventricles (lower chambers)

The wall of the heart is made up of three layers:

Epicardium- This is a protective layer made of connective tissues.
Myocardium- This layer forms the heart muscles.
Endocardium- This is the innermost layer and protects the valves and the heart.

ANSWER

What is the role of ciliary muscles?

Posted by Mahi..... ♾ 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 6 months ago

Ciliary Muscles:

The ciliary muscle to which eye lens is attached helps the eye lens to change its focal length by changing radii of curvature of eye lens.
When the eye is focused on a distant object, the ciliary muscles are relaxed so that the focal length of eye lens has its maximum value, which is equal to its distance from the retina.
The parallel rays coming into the eye are then focused on the retina and we see the object clearly.
When the eye is focused on a closer object the ciliary muscles are strained and focal length of eye-lens decreases. The ciliary muscles adjust the focal length in such a way that the image is formed on retina and we see the object clearly.

ANSWER

Name the unit of (a) electrical resistance (b) resistivity (c) electrical power (d) current

Posted by Haroon Ansari 5 years, 6 months ago

CBSE > Class 10 > Science

3 answers

Kirtika Sharma 5 years, 6 months ago

A . Ohm B. Ohm meter C. Watt D.ampere or coulomb per second

Haroon Ansari 5 years, 6 months ago

State and derive joule s law.

Nitin Paliwal 5 years, 6 months ago

(a) Ohm (b) Ohm - metre (c) Watt (d) Ampere Hope this Helps??

ANSWER

Name an antioxidant

Posted by Manasvi Rajendra 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 6 months ago

Antioxidants may be defined as substances that when present in food, delay, control or inhibit oxidation and deterioration of food quality. Antioxidants are compounds that inhibit oxidation.
Vitamins C and E, selenium, and carotenoids such as beta-carotene, lycopene, lutein, and zeaxanthin are examples of antioxidants.